Shock absorber bumper



Jam. 7, 1941.

A. SMB@ 7,560

SHOCK ABSORBER BUMPER Filed 001'.. 14, 1959 Patented Jan. 7, 1941UNITEDV` STATES PATENT FFICE 2,227,560 sHocK ABSORBER BUMPER A'AlexanderSzabo, Gary, Ind. `Apprwation october 14,1939, serial No. 299,595

2 Claims.

This invention relates to bumpers such as are commonly used on motorvehicles.

The object of this invention is to provide a shock :absorber mountingfor the bumper such as to oppose a suitable resilient resi-stance to asudden force applied to the bumper and in which the movable parts of theshock absorber are enclosed and protected.

Another object of this invention is to produce such a shock absorbermounting that is simple and cheap ,to manufacture, easy to install,efcient in operation and ornamental in appearance.

With the foregoing and other objects in view, the invention resides inthe novel arrangement and combination of pants and in the details ofconstruction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed maybe made within the scope of what is claimed without departing from thespirit of the invention.

A practical embodiment of the invention is illustrated in theaccompanying drawing, where in:

Figure 1 is a plan View Iof a bumper bar partly in section, showingshock absorber mounting at each end portion thereof.

Figure 2 is a sectional View :taken on line 2-J2, Figure 1, showingdetails of shock absorber mounting.

Referring to the drawing, I0 denotes a bumper bar of any conventionalsize, form and design. To the rear of the bumper bar IIJ are positioneda pair of leaf spring members II each provided with a pair `of springarms I2, I2a, the free ends of which are bent laterally outwardly as atI3, I3a to constitute attaching portions, each of which is secured tothe bumper bar as by a bolt I4. Preferably the attaching spring armportions I3a are each provided with a slot I5 through which .the bolt I4extends so as to permitl relative sliding movement between the springarms and the bumper bar upon impact thereon. A similar slidingconnection may be provided -at the other att-aching portions, if sodesired.

Between the intermediate portion Ila of each leaf spring member II andan adjacent chassis frame member I6 is disposed a shock absorber Ilwhich connects said spring members to the chassis frame members, in amanner to be hereinafter described.

Each shock absorber I'l comprises a solid cylindrical plunger I8 formedat one end with a wide radial seating flange I9 and an axial boltextension 20 adapted to be inserted through an opening 2l inthe end wall22 of a chassisl frame mem ber I6 and rigidly locked in place by thelock washer 23 and nut 2li. The plunger IB is adapted .for .telescopingmovement within al cylinder 25 which is open at one end to 'receive theplunger and closed at the other end by an integral wall 26. The cylinderend wall 2li is provided with a central opening 2l through which a guidebolt 28 is adapted to slidably project, said guide bolt forming an axialextension of the plunger I8 and being rigid therewith. Surrounding theguidebolt 28 and located wholly within the cylinder 25 is a compressioncoil spring 3d. Formed on each side of the end wall 2li of the cylinder25 and in diametric opposite relation are integral flanges tl 1 whichalong with the outer surface of the end wall 2li denne -a seat 32 forthe intermediate portion lla, of the spring member III. The intermediateportion Ila is provided with an opening 33 of ,the same size as theopening 2l through which the guide bolt 23 projects. A nut t4 threadedlymounted on the guide bolt 23 serves therewith as a means for adjustingthe compression of the coil spring 30. The intermediate portion Ila ofthe leaf spring member lI is rigidly secured to the cylinder seat 32 bymeans of rivets` or bolts 35, as clearly shown in Figure l.

In order to insure proper lubrication of the plunger and cylinder thereis provided in the plunger I3 adjacent the inner terminal end Iathereof, a peripheral groove (i6 in which is placed a lubricantabsorbent packing 3l. An oil cup or nipple 3B is mounted on the cylinder25 in registry with the plunger groove 36 to supply lubricant thereto asclearly shown in Figure 2.

It is obvious that it is the intention to so construct the shockabsorber that it may be applied to existing vehicles at small expense.

Having .thus described my invention, I claim as new and des-ire tosecure by Letters Patent:

l. A shock absorber mounting for a vehicle bumper 4comprising a plungermember, means attaching the same to a supporting chassis frame member, acylinder closed by a wall at one end telescopically mounted on saidplunger, resilient means within said cylinder bearing on said plungerand said cylinder end wall opposite thereto, a guide and adjusting boltformed integral with said plunger and projecting through an opening insaid cylinder end wall whereby .to adjust the compression of saidresilient means, and means attaching a bumper to said cylinder end wallin spaced relation thereto, said plunger being formed at its outer endwith an integral wide radial seating flange, an attaching bolt formedintegral with said `plunger at its outer end and adapted to be insertedthrough an opening in said chassis frame member for rigidly clamping theseating flange of said plunger thereto to provide said plunger attachingmeans, said plunger at its inner end portion being provided with aperipheral groove adapted to be covered by said cylinder in allpositions thereof, a lubricant absorbent packing in said groove, andlubricant means on said cylinder in normal registry with said groove forsupplying lubricant to said packing.

2. A shock absorber mounting for a vehicle bumper comprising a plungermember, means attaching the same to a supporting chassis frame member, acylinder closed by a wall at one end telescopically mounted on saidplunger, a coil spring Within said cylinder bearing on said plunger andsaid cylinder end Wallv opposite thereto, a guide and adjusting boltintegral with said plunger and projecting through an opening in saidcylinder end Wall whereby to adjust the compression of said coil spring,said plunger being formed at its outer end with an integral Wide radialseating ange, an attaching bolt formed integral with said plunger at itsouter end and adapted to be inserted through an opening in said chassisframe member for rigidly clamping the seating ange of said plungerthereto to provide said plunger attaching means, and means attaching abumper to said cylinder end Wall, said cylinder end wall being providedwith a pair of diametrically opposed `flanges defining With saidcylinder end Wall a. at seat, and said bumper attaching means comprisinga leaf spring member constituted by a iiat intermediate portion and apair of divergent arms, said intermediate portion seating on saidcylinder end Wall seat and being rigidly attached thereto by aconnection with the flanges thereof, an opening in said intermediateportion in registry with .the opening in said cylinder end. wall throughwhich saidI guide and adjusting bolt projects, and means connecting theends of said arms to said bumper ba-r.

ALEXANDER SZABO.

